Closure for hollow bodies.



A. RYDQUIST.

CLOSURE FOR HOLLOW BODIES.

APPLICATION FILED MAY 6.1918.

' Patented Mar. 18,1919.

CLOSURE FOR- HOLLOW BODIES.

Specification of Letters Patent.

Application filed May 6, 1918. Serial No. 232,742.

To all whom it may concern:

Be it known that I, ADoLPH RYDQUIsT, of Rochester, in the county of Monroe and State of New York, have invented certain new and useful Improvements in Closures for Hollow Bodies; and I do hereby declare the following to be a full clear, and exact description of the same, reference being had to the accompanying drawings, forming a part of this specification, and to the reference-numerals marked thereon.

My invention relates to closures for containers of liquid or solid materials which may be made of wood, metal or artificially made compositions.

The object of my invention is to produce a closure especially designed for protecting the open ends of finished hollow metal castings or other hollow parts from injury during handling and shipping and which may or may not be screw threaded at their open ends. The ends of hollow containers, finished pipes, engine cylinders and hollow machine parts which are shipped and handled before being filled or assembled and with the ends open and'exposed are frequently so badly injured as to be worthless.

This invention is designed to overcome this difficulty and produce a simple and inexpensive device which can be quickly inserted into the open ends of hollow bodies, offers complete protection to the ends of such bodies during handling, and which may be easily and quickly removed therefrom without injury to either internal or external screw threads which may be provided at or near the open ends of such bodies. At the same time, the thin edges and polished parts near or at the open mouth of the body are protected from injury. To these and other ends the invention consists in certam 1mprovements and combinations of parts, all

as will be hereinafter more fully described,

the novel features being pointed out in the claims at the end of the specification.

In the drawings:

Figure 1 is a cross section through the open end of a hollow body with the preferred form of my invention in position thereon;

Fig. 2 is a plan view of the same;

Fig. 3 is an enlarged elevation of my closure shown in Figs. 1 and 2 detached from.

the body;

Fig. 5 is a plan view of a modified form of my invention;

Fig. 6 is a bottom view of the closure shown in Fig. 5, and

Fig. 7 is an enlarged elevation of the same.

Similar reference numerals in the several figures indicate the same parts.

My invention consists of .a sheet metal body portion 1 adapted to contact or fit closely against the end of the Walls of the mouth or open part of a container, pipe or other open mouthed hollow body 2. The body portion 1 is made of the general form of the mouth of the body, and may be circular, square or of other suitable forms, the most useful form being circular, as illustrated in the drawings. The outer edge of the body portion, beyond or outside the side walls of the hollow body, is provided with a downwardly turned flange or lip portion 3 for the purpose of protecting the finished edge of the wall and more completely sealing the opening. The lip 3 also facilitates the removal of the closure by providing a convenient grip for the hand of a Workman, if he desires to remove the device by unscrewing it, or if the cap is to be pried off the lip forms an edge which may be engaged with any suitable object and by reason of its depending form it'adds stiflness to the cap piece, preventing the latter from bending. The central portion of the body of the closure may be depressed inwardly to extend slightly into the mouth of the opening, and thls depressed portion 4: may be provided wlth means for securing the closure in posit1on closely fitting against the side wallsof the mouth of the container or hollow body. Said means consists of a spring metal plate 5 having the general outline of the body portion of the closure and of a size convenient to fit snugly the opening in the mouth of the body. The construction is such that the spring metal plate may be readily forced into the mouth of the body which-it engages on account of its resiliency and securely holds the closure in position. The mouth of the hollow body may be provided with an inwardly projecting shoulder, over which the retaining member may be sprung to engage the inner side thereof to hold the closure in position, or the interior of the mouth of the hollow body may be screw threaded, as shown in Fig. 1, in which case the retain- Patented Mar. 18, 1919..

ing member may be formed with a lead to engage the screw thread and the closure screwed into the mouth of the hollow body.

The resilient securing member may be secured to the body of the closure by riveting or welding, or ears or lugs 6 may be struck up from the body to engage and securely hold the securing member to the body portion, as shown in Figs. 2 and 4: of the drawings. In order to further increase the resiliency of the securing member it 'may be formed with a plurality of arms or projections 7, as shown in Figs. 1 to 4 of the drawings, which may engage the interior of the mouth of the body or a shoulder formed therein, or the arms may be formed with a lead and screwed into an internally screw threaded mouth of a hollow body, as shown in the drawings.

The point of engagement of the securing member with the screw threads is substan-v tially in the plane of the bottom of the central depressed portion 4 so as to remove said point, as far as possible, from the lead end of the thread, thus avoiding any possibility of injuring it and also to so place the edges of the securing member that when the latter is canted within the screw thread, during the prying ofi' action, that the possibility of in- ]uring any portion of said screw thread is minimized.

When it is desired to remove the closure from the body, a slight blow against the overhanging lip or flange is sufiicient, as the resiliency of the securing member permits the same to be readily removed without injury to the interior or screw threads formed on the interior of the mouth of the hollow In order to form the lead on the resilient securing member, shown in Figs. 5 to 7, the edge may be notched as shown and the edges bent in opposite directions to form the lead.

In practice, I have found the method of attachment by spot welding shown in Figs. 5, 6 and 7 to be preferable to the other method of attachment shown and described. By securing the resilient locking plate to the body portion of the closure by spot welding as shown, a closure is provided which excludes moisture fromthe interior of the casting to which it is applied, and therefore protects it from rust or other chemical action as well as from physical injury.

I claim as my invention:

1. A closure for hollow bodies comprising a cap piece formed with an annular portion for engagement with the mouth of a hollow bod having a depressed central portion exten ing well within said mouth and provided with a lip depending fromv the annular portion to embrace the exterior side wall of the body, and a plate secured to the bottom of the depressed central portion having a plurality of resilient arms formed to engage interior projections in the mouth of the hol low body substantially in the plane of the bottom of said central depressed portion.

2. A closure for the ends of screw threaded ,hollow bodies comprising'a cap piece of sheet metal of a size to cover the end of such a body having a depressed portion of ,a diameter nearly equal to the interior diameter of the end of-the body to be closed and extending Well within the threaded portion thereof, and a second plate attached to the bottom of said depressed portion provided with a plurality of resilient fingers engaging the screw thread of the body substantiallv in the plane of the bottom of said do ressed portion.

ADOL H RYDQUIST. 

